Itty Bitty Double Extruder

[sreid55]

I found that printing the 3mm version of the body, drilling out the channel with an 11/64" bit makes a perfect fit for a bit of 4mmOD x 2mm ID PTFE tube in the channel.

http://smile.amazon.com/Fluorotherm-...sin=B00KJDK1N4

Still waiting for a few more parts to finish this up, but it looks promising.

[TechMasterJoe]

you can count me in for one just to help support the project.
Plus i had only planed to print the single hotend.
now i think i will setup dual. i have never really seen a real
reason outside of things like PVA support or printing 2 objects in two separate colors
yet i can't see a reason to care i have never really cared about color as much as print quality
and dual heads always seams to lead to problems with the ones at the school
(i took one nozzle off to fix a 2nd nozzle object crash at high Z on the schools Airwolf HDX2)


Is it just me or is reprapdiscount.com down completely today

[JRDM]

Do you have a weight of that whole setup? I designed a belted dual extruder earlier this fall and wanted to do NEMA 14s, but a slim NEMA 17 had better torque and lower weight than all the NEMA 14s that I could find. I can still easily alter it to support 14s though.

I do think going with a belt drive is a winner.

Also: I found SDP/SI to be a handy source for belts & pulleys.

[RobH2]

Do you have a weight of that whole setup?

As I was building this and testing it with 'clough42' I was interested in the weight also. I weighed my standard Wade's extruder (Magma hot end) and it was 607 grams. The dual hexagon weighed 701 grams. Not bad to add less then 100 grams to get a dual rig.

One nice side effect I've found is that if I'm careful, I can swap filaments out on the head that's not printing (if I'm not doing a dual head print) and save time. I'm printing with PLA now on my left head and I just switched out the ABS on the right head to nylon without messing up my print. That's nice.

[JRDM]

As I was building this and testing it with 'clough42' I was interested in the weight also. I weighed my standard Wade's extruder (Magma hot end) and it was 607 grams. The dual hexagon weighed 701 grams. Not bad to add less then 100 grams to get a dual rig.

One nice side effect I've found is that if I'm careful, I can swap filaments out on the head that's not printing (if I'm not doing a dual head print) and save time. I'm printing with PLA now on my left head and I just switched out the ABS on the right head to nylon without messing up my print. That's nice.

OK. I had managed to build a working 600g duallie, but with J-Heads. I have lighter motors to try to reach 500g but I've been just getting my practice and testing in before I built another set. I planned on my second build to have Hexagons and the lighter motors.

[TechMasterJoe]

Yeah, but I've typically found cyber Monday to be iffy as far as internet performance. Today's actually been better than usual.

Ya I can see that a lot of sites are slow newegg is crazy slow right now. I got a new gaming laptop just now a painful 1673$ but I wanted 32gb of ram and a good gpu because I'm in both solidworks and master-cam x8 all day.. I was going to order a new hexagon 3mm and nozzles guess it's got to wait lol

[jprochnow]

Let's see a video of this thing printing! I'm looking forward to a dual extruder!

[clough42]

Let's see a video of this thing printing! I'm looking forward to a dual extruder!

This is a live stream of a test print. It should be running for the next eight hours. Unless it fails utterly. After that, I'll come back and put in a better link and upload a time-lapse.

https://www.youtube.com/watch?v=UAGA5TIkg9w

I'm printing this:

http://www.thingiverse.com/thing:11687

[clough42]

This is a live stream of a test print.

You can see the home/autolevel/priming sequence starting at 06:30. I'm using Roxy's enhanced G29 code.

Here's the startup sequence:

• Heat the bed
• Start heating the nozzles
• Home and probe for autolevel (G28/G29)
• Park at Z=0 with both nozzles off the glass
• Wait for both nozzles to reach temperature
• Prime the left nozzle wipe it onto the glass
• Prime the right, retract it slightly and wipe it onto the glass
• Print alternating loops (Slic3r)
• Print

Slic3r prints the outside ring with the left nozzle first; that's why I retract the right nozzle slightly. This keeps it from dribbling while the left nozzle prints loops. After that, Slic3r automatically handles the retracts.

[RobH2]

You can see the home/autolevel/priming sequence starting at 06:30. I'm using Roxy's enhanced G29 code.

Here's the startup sequence:

• Heat the bed
• ...........
• Print

Do you mind sharing all of that code. I'm using Roxy's Enhanced 29 too but I'd like to try the "parks" and "wipes", etc.